Sheet-metal door construction.



M. LACHMA'N. S HEET METAL DOOR CONSTRUCTION. APPLICATION FILED OCT- 29,1913.

Patented Oct. 31, 1916.

I INVENTOR NflUR/CEZflCf/MA/V.

- ATTORNEYS SHEET-METAL DOOR CONSTRUCTION.

Specification of Letters'Patent.

Paton-ted Oct. 31. 1918.

Application filed ember 29, 1913. s mi No. 797,921..

To allwiiom it may concern:

Be it known that l, Maniacs LACIfMAN, a cit zen of the United States, and a resident of New York in the county of New York I and State of New York, have inyented certain new and useful Improvements in Sheet-'Metal Door Qoi'istruction, ofwhich the following is a. specification.

My present invention relates to sheet metal constructions such as doors, frames or the like and particularly relates to the manner of joining the two faces of the construction to each other to complete thestructi ire.

The object of the invention isto simplify and cheapcn the construction of sheet metal doors and frames and thereby increase, the use of such structures.

The invention consists in the improved construction hereinafter more particularly described and then specified in the claims. In the accompanying drawings, the invention is shown in its preferred form as applied to the construction of a sheet metal door but it'will be understood that this use of the same is for the purposes of illustra-.

tion only. i I

Figure 1 IS a front ele *ation of a sheet metal door embodying the present invention. Fig. 2 is a vertical cross sectioi-itaken on the line 2, 2 Fig. 1. p tal cross-section on an enlarged scale and taken on the line 3, 3 Fig. 1.. Fig. 4 is a fragmentary section of one corner of the.

construction and illustrates diagrammatically the welding electrodes preferabl y used to join the sections together. Fig. 5 is an enlarged cross-section through a stile meuiher illustrating a inddiliration of the invention. 1

1 and 2 indicate the front and rear face or stile plates of the door or frame. lhc door or frame; as is usual is provided with side and end stile incinl'iors which are secured'to each other along, lho inceting edges 3 in any desired manner as by soldering, brayling or other means well known in the art.

The stile plates 1. and 2 may be provided with moldings l in any desired manner plates and the panel plates forms no part Fig. 3 is a horizonofthe present invention andfurther de-' complete the structure it is merely necessary to join the outer free edges of the stile plates 1 and 2. r

9 indicates a sheet iiictalY spacing strip preferably U-shaped in cross-section. The strip 9 is inserted between the, stile plates 1 and 2 with the sides or legs of the strip bearing against the inneiw surfaces of the plates at or near the free edges. indicated'in Fig. l the side of the U-shaped strip land the stile plate are brought together between current supplying electrodes 10 and 11 and upon the passage of an electric current from one electrode to the other and the application of pressure the parts are welded together as is now well understood in the art. By the form of electrode shown a welding together of the parts in a spot is affected and when this type of welding is employed, the process is repeated any de sired number of times along'the plates 1 and 2 -to join the, parts at any multiplicity of points 15 desired.

Aftcrwelding the spacing member 5 to the plates 1 and 2 the space within the U-shaped spacing member is filled with a mass of material 12 flush with the free edges soas to attain a. fiush edge along the door. The materiah 12 may he fiber. cement, a block of metal or any other desired material inserted in a plastic state or properly formed to shape and then inserted.

Either before or after the material .12 is inserted the edges of the plates 1 and i are bent over to form flanges 13 which engage the surfaceofthe material 12 and hold it securely in the, U-shaped member 9. A flush, solid edge is thus provided for the door which cantheii have. the desired finish applied. 7 I

Referring to Fig. 5, instead of the panel plates (3 and 7 terminating at the molding members 4, as shownin Fig. 3, they may be extended into the stile members and terminate in flanges 6' and 7' which bea against the base of the U-shaped spacingmember 9.

In tliis case' the flan 'es (i' and 7 are ireferably electrically ivehied to the strip 9 at a number, of points of weld 16 preferably be fore the stile plates 1., and 2 are welded to .the sides of the strip 9, as' heretofore de- )osed stile plates, a U-shaped s acing strip aving its sides welded to said p ates, a mass strip and of material filling said spacin flanges at the edges of said p ates turned over the edges of the spacing strip and engaging the outer surface of said filling material.

2. In a door or frame COIlSlZl'HCtlOIl, op-

' posed stile plates, a U-shaped spacing strip having its sides welded to said plates, a mass of material filling said spacing strip and flanges secured to the edges of said ilates and folded over the outer surface 0 said filling material to hold the same in said spacing strip.

Signed at New York, in the county of New York and State of NewYor'k, this 22nd day of October, A. D. 1913.

MAURICE LACHMAN.

Witnesses F. B. TOWNSEND, Hsnnf'AsGnxs. 

